Bought new 12700K CPU bit Hybrid only utilizes 20 percent of it

[Selur]

Here's an example on my system,....

Decoding speed with 4k Video on my system (Rypezn 9 3950X, Geforce GTX 1070ti):
I'm using a Vappoursynth script and just VSPipe, so no encoding is happening, just the decoding and filtering.
(source parameters, format: avc, color sampling: YUV420P8, bit depth: 8, resolution: 4096x2160, fps: 25, color matrix: 2020ncl, yuv luminance scale: limited, scanorder: progressive)

Just decoding:
----------------------
Using:
LWLibavSource + hardware decoding:

clip = core.lsmas.LWLibavSource(source="G:/TestClips&Co/files/MPEG-4 H.264/4k/4k_sample_4096x2160.mp4", format="YUV420P8", cache=0, prefer_hw=1)

-> Output 6263 frames in 46.48 seconds (134.76 fps)

LWLibavSource + software decoding:

clip = core.lsmas.LWLibavSource(source="G:/TestClips&Co/files/MPEG-4 H.264/4k/4k_sample_4096x2160.mp4", format="YUV420P8", cache=0, prefer_hw=0)

-> Output 6263 frames in 56.70 seconds (110.46 fps)

LibavSMASHSource:

clip = core.lsmas.LibavSMASHSource(source="G:/TestClips&Co/files/MPEG-4 H.264/4k/4k_sample_4096x2160.mp4")

-> Output 6263 frames in 55.06 seconds (113.76 fps)

FFMS2Source:

clip = core.ffms2.Source(source="G:/TestClips&Co/files/MPEG-4 H.264/4k/4k_sample_4096x2160.mp4",cachefile="E:/Temp/mp4_b30946f06bbf6d3e0309b51cccf4cf0c_853323747.ffindex",format=vs.YUV420P8,alpha=False)

-> Output 6262 frames in 42.96 seconds (145.75 fps)

DGDecNV:

clip = core.dgdecodenv.DGSource("E:/Temp/mp4_b30946f06bbf6d3e0309b51cccf4cf0c_853323747.dgi")

-> Output 6263 frames in 38.71 seconds (161.78 fps)

Note that:
a. different source might show different speeds
b. decoding speeds can wary from run to run about 10%
c. depending on the system software decoding speeds can vary a lot
d. this is all without encoding
e. cpu usage can vary a lot

Just decoding + SVP:
----------------------
DGDecNV + SVP: (software, preset: medium, GPU: off)

clip = havsfunc.InterFrame(clip, Tuning="smooth", NewNum=60, NewDen=1) # new fps: 60

-> Output 15029 frames in 656.85 seconds (22.88 fps) (~64-85% cpu usage of VSPipe)

DGDecNV + SVP: (software, preset: medium, GPU: on)

clip = havsfunc.InterFrame(clip, Tuning="smooth", NewNum=60, NewDen=1, GPU=True) # new fps: 60

-> Output 15029 frames in 1129.21 seconds (13.31 fps) (~51-80% cpu usage of VSPipe)

FFMS2Source + SVP: (software, preset: medium, GPU: on)

clip = havsfunc.InterFrame(clip, Tuning="smooth", NewNum=60, NewDen=1, GPU=True) # new fps: 60

=> Output 15027 frames in 201.62 seconds (74.53 fps) (~30-40% cpu usage of VSPipe)

So software decoding and using SVP through the gpu gives the best speed on my system, but the cpu usage isn't that high.

Note:
1. When encoding is added things are changed up!
2. high cpu usage does not necessarily mean high speed
3. different GPU and CPU the numbers can be totally different

=> There is no: "Use this and your cpu usage and speed will be top"
Only thing you can do is check what works best on your system, by identifing bottlenecks.

Cu Selur